CN203421678U - Comprehensive utilization system for pebble coal - Google Patents
Comprehensive utilization system for pebble coal Download PDFInfo
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- CN203421678U CN203421678U CN201320480723.7U CN201320480723U CN203421678U CN 203421678 U CN203421678 U CN 203421678U CN 201320480723 U CN201320480723 U CN 201320480723U CN 203421678 U CN203421678 U CN 203421678U
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Abstract
A comprehensive utilization system for pebble coal comprises a plurality of units, a pebble coal conveying device and a circulating fluidized bed boiler, wherein each unit is provided with a plurality of intermediate speed coal mills; an auxiliary steam header is arranged in the unit; the pebble coal conveying device is connected with the intermediate speed coal mills of the units, and is connected with a pebble coal bunker; the circulating fluidized bed boiler is connected with the pebble coal bunker, and is connected with a blower and a water feed device; the circulating fluidized bed boiler is connected with the auxiliary steam headers of all the units. Steam generated through burning the pebble coal in the circulating fluidized bed boiler and heating feed water through heat generated during the process of pebble coal burning is conveyed to the units, the steam extraction capacity of a steam turbine of the units is reduced, the unit output is increased, the coal consumption of the units is reduced, the system can comprehensively and efficiently utilize the pebble coal discharged from the units, the problem of land occupation caused by the situation that the pebble coal is accumulated to be discharged is solved, and the environment pollution is avoided.
Description
Technical field
The utility model is relevant for a kind of pebble coal treatment system, especially relevant for a kind of pebble coal utilization system of processing pebble coal.
Background technology
In recent years, thermal power generation unit has obtained fast development, large capacity, a large amount of, the concentrated operations of high parameter generating set, and medium-speed pulverizer has obtained application quite widely simultaneously.In prior art, medium-speed pulverizer discharges the particle that is not easy to grind in running, and its main component has gangue, pyrite etc., also carries some raw coal simultaneously secretly, and has certain calorific value.At present, the pebble coal particle discharging there is no and be effectively utilized, but directly transports or drain into slag removing system, not only wasted a large amount of energy, and piles up the waste that pebble coal has also caused tract.
The anxiety of electricity coal supply also causes coal-fired power plant composition changeable, and a lot of power plant have multiple coal supply mode, in transportation, inevitably can bring a large amount of impurity into, make burning ature of coal and the designing coal quality of a lot of power plant have larger difference, therefore in utilizing medium-speed pulverizer pulverizing process, can discharge a large amount of pebble coals, add unreasonable to the limitation of medium-speed pulverizer lectotype selection and the method for operation of a lot of power plant, in the pebble coal of discharge, carried a large amount of raw coal secretly, directly discharge, contaminated environment not only, and cause a large amount of wastes of the energy.
Existing power plant stone coal discharge is unstable, and pebble coal complicated component, and the pebble coal discharging is difficult to carry out integrated treatment and utilization.And for current large-scale, large capacity thermal power generation unit, many medium-speed pulverizers have been assembled, when ature of coal variation and the method for operation occurring when unreasonable, can discharge a large amount of pebble coals, only relying on pebble coal treatment system to be transported abandons, really not wise move, and monoblock is in operation and need to consumes a large amount of steam, usually, power plant has configured startup boiler or from unit, has drawn gas to meet this requirement, not only waste energy, and reduced and entered the steam flow that steam turbine does work, reduced exerting oneself of unit, make the unit coal consumption of power plant increase.
Therefore, be necessary to provide a kind of system of new processing pebble coal, overcome above-mentioned defect.
Utility model content
The purpose of this utility model is to provide a kind of pebble coal utilization system, by burning in circulating fluid bed boiler pebble coal the heat heated feed water producing by burning pebble coal and then produce steam and be delivered in monoblock, reduced the extracted steam from turbine amount of monoblock, increased unit output, saved the energy, reduced the coal consumption of monoblock, this pebble coal utilization system, can be comprehensively, the pebble coal that discharges of efficient range site unit, solve pebble coal and pile up the problem of discharge land occupation, avoided environmental pollution.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
The utility model provides a kind of pebble coal utilization system, and described pebble coal utilization system comprises:
A plurality of monoblock, described in each, monoblock has a plurality of medium-speed pulverizers, is provided with auxiliary steam header in described monoblock;
Pebble coal conveying device, it is connected with a plurality of medium-speed pulverizers of monoblock described in each, and described pebble coal conveying device is connected with stone coal bunker;
CFBB, it is connected with described stone coal bunker, and described CFBB is connected with blower fan and waterworks, and described CFBB is connected with the auxiliary steam header of monoblock described in each by the female pipe of Boiler Steam.
In a preferred embodiment, described monoblock also has monoblock pebble coal conveying device, described in each, a plurality of medium-speed pulverizers of monoblock are connected with described monoblock pebble coal conveying device respectively, and described monoblock pebble coal conveying device is connected with described pebble coal conveying device.
In a preferred embodiment, the bottom of described medium-speed pulverizer is connected with stone coal bunker, and the bottom of described stone coal bunker is connected with pebble coal batcher, and described pebble coal batcher is connected with described monoblock pebble coal conveying device.
In a preferred embodiment, between described stone coal bunker and described CFBB, be connected with pebble coal screening breaker.
In a preferred embodiment, the bottom of described stone coal bunker is connected with stone coal bunker outlet delivery device.
In a preferred embodiment, described CFBB is connected with chimney.
In a preferred embodiment, described pebble coal conveying device is negative pressure pneumatic conveying apparatus, belt conveyor or flight chain conveying device.
In a preferred embodiment, described stone coal bunker is provided with level-sensing device.
In a preferred embodiment, described stone coal bunker is provided with dust arrester and anti-block apparatus.
In a preferred embodiment, the bottom of described stone coal bunker is inversed-cone shape.
Feature and the advantage of pebble coal utilization system of the present utility model are: pebble coal utilization system of the present utility model, CFBB is integrated in a plurality of monoblock, monoblock is in operation discharged pebble coal after monoblock pebble coal conveying device and pebble coal conveying device are collected, processed, be sent in CFBB and burn, the heat of burning in circulating fluid bed boiler adds thermosetting steam by the water in waterworks, and those steam are assigned in the auxiliary steam header of each monoblock.This pebble coal utilization system has not only solved the harm of stone coal discharge to environment, avoided environmental pollution, and by circulating fluidized bed boiler, pebble coal is burnt, and fully utilize the heat heated feed water that pebble coal burning produces, the steam that feedwater after heating forms arrives each monoblock through the system integration, reduce the amount of drawing gas of the steam turbine that connects each monoblock, improved exerting oneself of unit, reduced the coal consumption of unit.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of pebble coal utilization system of the present utility model.
Fig. 2 is the structural representation of the monoblock of pebble coal utilization system of the present utility model.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of pebble coal utilization system, and it comprises a plurality of monoblock 1, pebble coal conveying device 2 and CFBB 3.Wherein: described in each, monoblock 1 has a plurality of medium-speed pulverizers 11, in described monoblock 1, be provided with auxiliary steam header 12; Pebble coal conveying device 2 is connected with a plurality of medium-speed pulverizers 11 of monoblock described in each 1, and described pebble coal conveying device 2 is connected with stone coal bunker 4; CFBB 3 is connected with described stone coal bunker 4, and described CFBB 3 is connected with blower fan 5 and waterworks 6, and described CFBB 3 is connected with the auxiliary steam header 12 of monoblock described in each 1 by the female pipe 7 of Boiler Steam.
Specifically, shown in Fig. 2, be provided with a plurality of medium-speed pulverizers 11 in each monoblock 1, the quantity of medium-speed pulverizer 11 is selected to set according to actual needs, at this, does not limit.Auxiliary steam header 12 in each monoblock 1 is positioned at the top of a plurality of medium-speed pulverizers 11, and it is for being assigned to superheated steam in each monoblock 1.In the utility model, this monoblock 1 also has monoblock pebble coal conveying device 15, and a plurality of medium-speed pulverizers 11 of each monoblock 1 are connected with this monoblock pebble coal conveying device 15 respectively.In the present embodiment, the bottom of medium-speed pulverizer 11 is connected with stone coal bunker 13, and the bottom of stone coal bunker 13 is connected with pebble coal batcher 14, and medium-speed pulverizer 11 is connected with monoblock pebble coal conveying device 15 by pebble coal batcher 14.The pebble coal that stone coal bunker 13 discharges at running for collecting corresponding medium-speed pulverizer 11, and the pebble coal of its collection is delivered to monoblock pebble coal conveying device 15 through pebble coal batcher 14.
Pebble coal conveying device 2 is connected with the monoblock pebble coal conveying device 15 of each monoblock 1, and it is transported in stone coal bunker 4 for the pebble coal that a plurality of medium-speed pulverizers of each monoblock 1 11 are produced.In the utility model, pebble coal conveying device 2 can be negative pressure pneumatic conveying apparatus, belt conveyor or flight chain conveying device.Stone coal bunker 4 has the effect of intermediate buffering, and it can carry out intermediate storage and buffering to the pebble coal of each medium-speed pulverizer 11 discharges in each monoblock 1.In the present embodiment, described stone coal bunker 4 is provided with level-sensing device 41, dust arrester 42 and anti-block apparatus 43, wherein, level-sensing device 41 is for detection of the capacity of pebble coal in stone coal bunker 4, dust arrester 42 is for carrying out dust removal process to being delivered to the pebble coal of stone coal bunker 4, and anti-block apparatus 43 can prevent that the pebble coal in stone coal bunker 4 from stopping up.In the utility model, the bottom of this stone coal bunker 4 is designed to the shape of inversed-cone shape, and the benefit of design is to be easy to pebble coal carry in stone coal bunker 4 like this; In the present embodiment, the bottom of described stone coal bunker 4 is also connected with stone coal bunker outlet delivery device 44, and it is for discharging the unnecessary pebble coal of stone coal bunker 4.
CFBB 3 receives the pebble coal from stone coal bunker 4, and the air of carrying by blower fan 5 is to the processing of burning of those pebble coals.In the utility model, between described stone coal bunker 4 and described CFBB 3, be also connected with pebble coal screening breaker 8, this pebble coal screening breaker 8 is broken to make pebble coal particle for pebble coal is sieved, to meet the required requirement of circulating fluidized bed boiler 3 burning, in the utility model, those diameters that meet into the pebble coal particle of stove specification are less than 3mm.Described CFBB 3 is connected with chimney 9, the waste gas that it burns after pebble coal particles for discharge cycle fluidized-bed combustion boiler 3.
Be connected to the waterworks 6 on CFBB 3, under the effect of the heat burning at CFBB 3, add thermosetting steam, the female pipe 7 of Boiler Steam of those steam self-loopa fluidized-bed combustion boiler 3 upper ends is delivered in each monoblock 1, in the utility model, the auxiliary steam of each monoblock 1 connects case 12 and is connected with steam branch pipe 16, and the female pipe of Boiler Steam 7 steam branch pipes 16 that connect on case 12 with the auxiliary steam of each monoblock 1 are connected.
The process that this pebble coal utilization system is processed pebble coal is as follows: first, by monoblock pebble coal conveying device 15, the pebble coal of 11 discharges of a plurality of medium-speed pulverizers in corresponding unit unit 1 is collected, carried; Then, utilize pebble coal conveying device 2 that the pebble coal of a plurality of monoblock 1 is concentrated and collected, carries and process, then focus in stone coal bunker 4 and store; Afterwards, the pebble coal that stone coal bunker 4 is collected is processed through pebble coal screening breaker 8, made the pebble coal particle with certain particle size, to meet the requirement of CFBB 3 burnings; Enter the stove burning wind that enters that the pebble coal particle of CFBB 3 and blower fan 5 carry and in CFBB 3, carry out efficient, clean burning, the waste gas that burning pebble coal particle produces is got rid of through chimney 9; The heat that CFBB 3 burnings produce is heated to the water in waterworks 6 steam with certain degree of superheat, the temperature of those steam can meet the requirement of the auxiliary steam of monoblock 1, those steam are guided in each monoblock 1 by the female pipe 7 of Boiler Steam, and by monoblock steam branch pipe 16, send into respectively in the auxiliary steam header 12 of each monoblock 1, auxiliary steam connects the amount of drawing gas that steam in case 12 can reduce monoblock 1 effectively, increase exerting oneself of unit, reduce coal consumption.
Pebble coal utilization system of the present utility model, CFBB 3 is integrated in a plurality of monoblock 1, monoblock 1 is in operation discharged pebble coal after monoblock pebble coal conveying device 15 and 2 collections of pebble coal conveying device, processing, be sent in CFBB 3 and burn, the heat of CFBB 3 burnings adds thermosetting steam by the water in waterworks 6, and those steam are assigned in the auxiliary steam header 12 of each monoblock 1.This pebble coal utilization system has not only solved the harm of stone coal discharge to environment, avoided environmental pollution, and burn by 3 pairs of pebble coals of circulating fluidized bed boiler, and fully utilize the heat heated feed water that pebble coal burning produces, the steam that feedwater after heating generates arrives each monoblock 1 through the system integration, reduce the amount of drawing gas of the steam turbine that connects each monoblock 1, improved exerting oneself of unit, reduced the coal consumption of unit.
The foregoing is only several embodiment of the present utility model, those skilled in the art can carry out various changes or modification and not depart from spirit and scope of the present utility model the utility model embodiment according to the disclosed content of application documents.
Claims (10)
1. a pebble coal utilization system, is characterized in that, described pebble coal utilization system comprises:
A plurality of monoblock, described in each, monoblock has a plurality of medium-speed pulverizers, is provided with auxiliary steam header in described monoblock;
Pebble coal conveying device, it is connected with a plurality of medium-speed pulverizers of monoblock described in each, and described pebble coal conveying device is connected with stone coal bunker;
CFBB, it is connected with described stone coal bunker, and described CFBB is connected with blower fan and waterworks, and described CFBB is connected with the auxiliary steam header of monoblock described in each by the female pipe of Boiler Steam.
2. pebble coal utilization system as claimed in claim 1, it is characterized in that, described monoblock also has monoblock pebble coal conveying device, described in each, a plurality of medium-speed pulverizers of monoblock are connected with described monoblock pebble coal conveying device respectively, and described monoblock pebble coal conveying device is connected with described pebble coal conveying device.
3. pebble coal utilization system as claimed in claim 2, it is characterized in that, the bottom of described medium-speed pulverizer is connected with stone coal bunker, and the bottom of described stone coal bunker is connected with pebble coal batcher, and described pebble coal batcher is connected with described monoblock pebble coal conveying device.
4. pebble coal utilization system as claimed in claim 1, is characterized in that, is connected with pebble coal screening breaker between described stone coal bunker and described CFBB.
5. pebble coal utilization system as claimed in claim 1, is characterized in that, the bottom of described stone coal bunker is connected with stone coal bunker outlet delivery device.
6. pebble coal utilization system as claimed in claim 1, is characterized in that, described CFBB is connected with chimney.
7. pebble coal utilization system as claimed in claim 1, is characterized in that, described pebble coal conveying device is negative pressure pneumatic conveying apparatus, belt conveyor or flight chain conveying device.
8. pebble coal utilization system as claimed in claim 1, is characterized in that, described stone coal bunker is provided with level-sensing device.
9. pebble coal utilization system as claimed in claim 1, is characterized in that, described stone coal bunker is provided with dust arrester and anti-block apparatus.
10. pebble coal utilization system as claimed in claim 1, is characterized in that, the bottom of described stone coal bunker is inversed-cone shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480723.7U CN203421678U (en) | 2013-08-07 | 2013-08-07 | Comprehensive utilization system for pebble coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480723.7U CN203421678U (en) | 2013-08-07 | 2013-08-07 | Comprehensive utilization system for pebble coal |
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| CN203421678U true CN203421678U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320480723.7U Expired - Lifetime CN203421678U (en) | 2013-08-07 | 2013-08-07 | Comprehensive utilization system for pebble coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344403A (en) * | 2013-08-07 | 2015-02-11 | 国家电网公司 | Pebble coal comprehensive utilization system |
| CN105299632A (en) * | 2015-10-26 | 2016-02-03 | 何相助 | Fully-sealing micro-particle circulating fluidized bed boiler combustion process and equipment |
-
2013
- 2013-08-07 CN CN201320480723.7U patent/CN203421678U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344403A (en) * | 2013-08-07 | 2015-02-11 | 国家电网公司 | Pebble coal comprehensive utilization system |
| CN104344403B (en) * | 2013-08-07 | 2017-04-12 | 国家电网公司 | Pebble coal comprehensive utilization system |
| CN105299632A (en) * | 2015-10-26 | 2016-02-03 | 何相助 | Fully-sealing micro-particle circulating fluidized bed boiler combustion process and equipment |
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| GR01 | Patent grant | ||
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Granted publication date: 20140205 |